IMAMATE AND LEADERSUIP: is one of the best books on the subject proving with convincing evidences from authentic Sunni sources the immediate successorship of Imam 'ali b.Abu Talib and the question of Imamate as a prerogative bestowed by God upon a chosen person, from the family of the Prophet, who before his death and with the guidance of God, transfers the Imamate to another by an explicit designation (nass).